@Misc{Wiki,
 howpublished = {\url{http://en.wikipedia.org/wiki/Thamnophis_butleri}}
} 

@Book{Kooy2010,
 author = {Kooijman, S.A.L.M.},
 year = {2010},
 title  = {Dynamic Energy Budget theory for metabolic organisation},
 publisher = {Cambridge Univ. Press, Cambridge},
 pages = {Table 4.2 (page 150), 8.1 (page 300)},
 howpublished = {\url{../../../bib/Kooy2010.html}}
} 

@Article{Carp1952,
 author = {Charles C. Carpenter},
 year = {1952},
 title = {Growth and Maturity of the Three Species of \emph{Thamnophis} in {M}ichigan},
 journal = {Copeia},
 volume = {1952(4)},
 pages = {237-243}
} 

@Misc{AnAge,
 howpublished = {\url{http://genomics.senescence.info/species/entry.php?species=Thamnophis_butleri}}
}